Board Thread:General Discussion/@comment-32473164-20170707095038/@comment-30804097-20170707155242

First of all, if anyone has an Egg, they should either already know what it is since they have either bred for it or traded for it (with the exception with the gift in Lagoona Lake, which those Eggs are Seviper or Zangoose). Obviously, if you bred it, you would know by looking at the female in the daycare, while when you traded it, you should have asked what it was before trading it.

The egg's appearance and average amount of steps to hatch it can be searched up. Bulbapedia is a reliable source of basic knowledge.